• Think of the customer first, in order to maximize sales
• Create a safe server environment and database
• Use secure transactions and prevent common vulnerabilities
• Incorporate different payment gateways
• Design scalable sites that are easy to maintain
• Build administrative interfaces
• Extend both examples to match the needs of your own sites

Larry Ullman is the president of Digital Media and Communications Insights, Inc., a firm specializing in information technology (www.dmcinsights.com). He is the author of several bestselling programming and Web development books, including PHP and MySQL for Dynamic Web Sites: Visual QuickPro Guide. Larry also writes articles on these subjects and teaches them in small and large group settings. Despite working with computers, programming languages, databases, and such since the early 1980s, Larry still claims he’s not a computer geek (but he admits he can speak their language).